Hi sambotc,
Just to keep you informed sam, first, I must have misunderstood you regarding moving my cylinder, and after feeling very despondent, (pi**ed of in other words) I emailed the engineer who fitted the stove in the first place,( as i've said before is off work at the moment after an operation on his knee) telling him that I had conceded defeat, and there was no need for him to call round, BUT, he said he WANTED to come round and see if anything can be done to improve the situation anyway, and, without any prompting from me, one of the things he said he wanted to try was a gate valve on the return from the cylinder, "so you see sam, great minds think alike" and I felt a lot better in myself, knowing that he had NOT give up on me.
so I will keep you informed as to the outcome.
Regards
pioner